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Although we are a general veterinary practice with emphasis on wellness care, we do work in all areas of veterinary medicine. Our veterinarians have interest in dermatology, endocrinology, neurology, alternative medicine therapies, internal medicine, parasite prevention and treatment, eye exams (with ocular tonometry), cardiology, prevention and management of tick disease, feline asthma, animal behavior, pain management, physical therapy, and dentistry.



Weather may affect our hours on Tuesday
March 14, 2023. 
Please call ahead

 24 hr Emergency Referrals

  Tufts School of Veterinary Medicine

           200 Westboro Rd. Rt. 30

          North Grafton, MA 01536




   Veterinary Emergency Group

         196 Boston Tpke, Ste 1

         Shrewsbury, MA 01545

                 (508) 653-4700


   Westford Veterinary Emergency

           11 Cornerstone Square  

              Westford, MA 01886 

                 (978) 577-6525  


869 South Street, Fitchburg, MA 01420

Find Us


CALL: 978-343-3049

***Due to COVID-19 hours are subject to change.***


Monday:  8:00 AM - 7:00 PM

Tuesday:  8:00 AM - 6:00 PM
Wednesday:  8:00 AM - 7:00 PM

Thursday:  8:00 AM - 5:00 PM

Friday:  8:00 AM - 4:00 PM

We will be open 1 Saturday

per month 9 AM to 1 PM

(call ahead) 

By appointment only

Our Services
About Our Clinic


The most important component in maintaining your pet's health is the yearly comprehensive medical exam. In this exam, your veterinarian will check your pet's: skin, mouth, ears, eyes, joints, nervous system, lungs, heart, etc.

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We offer vaccinations specifically tailored to your pet's lifestyle which could include: Canine Distemper, Feline Leukemia Virus, Canine Flu, Lyme Disease, Bordetella, Rabies, etc.

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We have in place a variety of optional wellness programs which assist in preventative medicine and are used to educate you so you can make informed decisions regarding your pets health care. Wellness exam packages are specifically tailored to your pet's age and needs.

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We offer limited emergency care during regular office hours to clients only. After hours, call our main number for emergency instruction.  If our veterinarians are not available, we refer to Tufts, Westford or Wachusett. Find their information in the Find Us Section.

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We offer basic surgical services such as spays, neuters , soft tissue surgery, and general orthopedic surgery.

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X-Rays are necessary to aid in the evaluation of musculo-skeletal, cardiovascular, gastrointestinal, reproductive, and urinary system disorders. We us radiography as part of our senior/geriatric wellness programs, and in the evaluation of many critical and care and emergency patients.

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Throughout veterinary school Dr. Baldarelli spent time working in the Tufts Behavior Clinic as well as working with a veterinary behavior specialist. She will provide advice regarding the behavior of your pet.

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Regular professional teeth cleaning is important to maintain your pet's overall health. We use ultrasound to clean each tooth thoroughly. When appropriate, we also perform oral surgical procedures such as surgical extractions. Find out what your pets needs are at a scheduled appointment.

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We carry a range of prescription diets, appropriate for specific medical conditions and can counsel you on the specific needs of your pet. We also offer complimentary comprehensive nutritional counseling for our obese patients and can help you tailor a specific diet plan to your dog's or cat's needs.

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Nutritional Counseling

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Twin City Animal Hospital was founded in 1977 by Dr. Samuel Yoon. It was originally located on Water Street in Fitchburg. ​In 1984, Dr. Yoon opened the current building , at 869 South Street, Fitchburg, MA.


Dr. Terra Baldarelli, a Fitchburg native and graduate of Tufts University Veterinary College, began working here in 1999. In 2017, upon Dr. Yoon's retirement, Dr. Terra Baldarelli took over the practice.

At Twin City Animal Hospital we are dedicated to offering high quality, lifelong care for your four-legged family members. We pride ourselves in offering honest,  and compassionate care in a warm environment. It is our mission to provide you with opportunities to practice preventative and progressive health care at an affordable price. We are here to help you make educated and informed decisions about your pet's medical care. We hope you choose to join the Twin City Animal Hospital family. 

Call 978-343-3049 to make an appointment so that our health care team can discuss what is best for your pet's health.

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